This is CycleChat for goodness sake: why are you bringing motor vehicles into it?
I thought this was a simple way of explaining things, scientific it isn't.
A rider averaging 150w over 100km on the flat (and everything else kept the same) on a 9kg bike would complete 14 seconds faster than a rider on a 10kg bike (210:57 v 211:11). On that analysis is (bike) weight "[one of the two] most important factors"? I suggest not.
If one sets the amount of climb to 1% (rather flat for Devon), then the difference is greater: the rider on a 9kg bike takes nearly a minute shorter (shock, horror - the bike is sooo much 'easier' to ride - not).
This is a more scientific aproach and proves my point that a lighter bike is easier to ride than an heavier one, although I agree its not a signifcant difference. and not the only factor to consider.
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